Diagnostic Tests: Notes

WARNING: This page is about a different car, the 2002 Pontiac Sunfire, 2002 Chevrolet Cavalier, 2001 Pontiac Sunfire, and 2001 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: System tests were written specifically for use with Tech 2 scan tool. Other generic scan tools can be used, but may have limited functions.

NOTE: Do not replace Body Control Module (BCM) unless a Diagnostic Trouble Code (DTC) remains current after all DTC repair procedures have been performed. Do not replace BCM based on history DTCs.

Body Control Module (BCM) is equipped with a self-diagnostic system, which detects system Diagnostic Trouble Codes (DTCs) or abnormalities. When a malfunction occurs, BCM will store a DTC. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . Malfunctions are recorded as history/intermittent failures or as current failures. Current DTCs indicate BCM has detected a fault which currently exists. A history DTC indicates that BCM has previously detected a malfunction that does not currently exist.